Finding the Fourth Proportional to 9,185.82, 12,679.28 and 5,408.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,185.82 : 12,679.28 = 5,408.68 : x
2. Step 2: Convert to fraction form
   9,185.82/12,679.28 = 5,408.68/x
3. Step 3: Cross multiply
   9,185.82x = 12,679.28 × 5,408.68
4. Step 4: Simplify right side
   9,185.82x = 68,578,168.15
5. Step 5: Solve for x
   x = 68,578,168.15/9,185.82
6. Step 6: Final answer
   x = 7,465.66